Fridge Filterz FFFD-311-2 cyst filter (Standard 42 & 53) 2 Pack replacement water filter is designed to fit selected Frigidaire* & Kenmore* refrigerators. This premium water filter is designed to remove sediment, Chlorine Taste and Odour as well as contaminants and heavy metals including Lead, Mercury, Lindane, 2-4-D, atrazine and benzene, to name a few, that may be present in your drinking water. This refrigerator filter replaces: Frigidaire* Filter 5303917752, RF200, RC200, RD101 - Kenmore* Filter 46-9906, 9906. The FFFD-311-2 is tested to meet NSF/ANSI Standard 42 & 53, Particulate Class I, to ensure that you are getting a SAFE, quality product. Fridge Filterz are manufactured to the highest quality standard, providing you and your family with clean, odour free ice and water without removing beneficial minerals and fluoride that may be present in your drinking water. Fits refrigerator models beginning with 253 or 970, which were produced before the 2001 energy standard.